hi, all, i have a question about getparameter
for example, i have the codes as below:
1.jsp
String selectdata="any";
if (request.getParameter("selectdata").equals("submit")) {
jobs.selectsingledata();
}
i have two jsp pages, for example, A.jsp and B.jsp. both A and B go to
1.jsp, so i set one paramter in A.jsp to get the difference. if came from
A.jsp, the jobs.selectsingledata() get executed, but if came from B.jsp, it
showed the error message like "java.lang.NullPointerException".
i think the problem is i have to initialize the variable "selectdata", but i
dont' know how to do it exactly, it seemed that my code above doesn't work
at all...
thanks...
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